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UNIRAS Brief - 595/04 - Two Sun Alert Notifications:



 
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   UNIRAS (UK Govt CERT) Briefing Notice - 595/04 dated 27.10.04  Time: 11:50  
  UNIRAS is part of NISCC (National Infrastructure Security Co-ordination Centre)
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  UNIRAS material is also available from its website at www.uniras.gov.uk and
         Information about NISCC is available from www.niscc.gov.uk
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Title
=====

Two Sun Alert Notifications:

1. Sun Alert Notification 57664 - Security Vulnerability in Samba May Allow 
Unauthorized Root Privileges

2. Sun Alert Notification 57658 - Security Vulnerabilities Involving the 
utempter(8) Utility



Detail
====== 

1. Impact A buffer overflow in Samba may allow a remote unprivileged user the 
ability to execute arbitrary code with the privileges of Super User (typically root) 
on a Solaris 9 system running as a Samba server.

2. Impact Unprivileged local users may be able to overwrite arbitrary files on a system 
due to a security vulnerability in the utempter(8)utility.


1.



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===========================================================================
             
               ESB-2004.0678 -- Sun Alert Notification 57664
  Security Vulnerability in Samba May Allow Unauthorized Root Privileges
                              27 October 2004

===========================================================================

        

Product:                Samba
Publisher:              Sun Microsystems
Operating System:       Solaris 9
                        UNIX variants
Impact:                 Execute Arbitrary Code/Commands
Access:                 Remote/Unauthenticated
CVE Names:              CAN-2004-0686

Ref:                    ESB-2004.0474
                        ESB-2004.0467

Original Bulletin URL:
  http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-57664-1

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   Sun(sm) Alert Notification 
     * Sun Alert ID: 57664
     * Synopsis: Security Vulnerability in Samba May Allow Unauthorized
       Root Privileges
     * Category: Security
     * Product: Solaris
     * BugIDs: 5080288
     * Avoidance: Workaround
     * State: Committed
     * Date Released: 25-Oct-2004
     * Date Closed:
     * Date Modified:

   1. Impact A buffer overflow in Samba may allow a remote unprivileged
   user the ability to execute arbitrary code with the privileges of
   Super User (typically root) on a Solaris 9 system running as a Samba
   server.

   This issue is referenced in the following document:

     * CAN-2004-0686 at:
       [2]http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0686

   2. Contributing Factors This issue can occur in the following
   releases:

   SPARC Platform

     * Solaris 9

   x86 Platform

     * Solaris 9

   Note: Solaris 7 and Solaris 8 do not include the Samba software and
   are not affected by this issue. Sun does include Samba on the Solaris
   Companion CD for Solaris 8 as an unsupported package which installs to
   "/opt/sfw" and is vulnerable to this issue. Sites using the freeware
   version of Samba from the Solaris Companion CD will need to upgrade to
   a later version from Samba.org.

   This issue only occurs if all of the following conditions are true:

     * The system is configured as a Samba server
     * The version of Samba installed is 2.2.0 through 2.2.9 or 3.0.0
       through 3.0.4
     * The server is configured to use the "hash" mangling method. (This
       is the default configuration for Samba 2.2.x only)

   To determine if a system is configured as a Samba server, use the
   following command to check for the presence of the smb.conf(4) file:

    % ls -l /etc/sfw/smb.conf
    -rw-r--r--   1 root     other      11665 Sep 28 16:37 /etc/sfw/smb.conf


   If the output is similar to that shown above, the system is configured
   as a Samba server.

   To determine the version of Samba installed on a system, the following
   command can be run:

    % /usr/sfw/sbin/smbd -V
    Version 2.2.8a

   To determine if the server is configured to use the "hash" mangling
   method, the following command can be run:

    % grep 'mangling method' /etc/sfw/smb.conf

   If the output is either of the following, then the system is
   vulnerable:

    1. "mangling method = hash"
    2. There is no output AND the Samba version is 2.2.x

   Note: For Samba 2.2.x the default is "mangling method = hash". If this
   has not been changed, there will be no entry in the
   "/etc/sfw/smb.conf" file for "mangling method".

   3. Symptoms There are no predictable symptoms that would indicate the
   described issue has been exploited.

   Solution Summary [3]Top

   4. Relief/Workaround Servers which are configured to use the "hash2"
   mangling method are unaffected by this issue. As a result, this issue
   can be avoided by modifying or adding the following "mangling method"
   line to smb.conf(4):

    mangling method = hash2

   5. Resolution A final resolution is pending completion.

   This Sun Alert notification is being provided to you on an "AS IS"
   basis. This Sun Alert notification may contain information provided by
   third parties. The issues described in this Sun Alert notification may
   or may not impact your system(s). Sun makes no representations,
   warranties, or guarantees as to the information contained herein. ANY
   AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
   WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
   NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT
   YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT,
   INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE
   OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN.
   This Sun Alert notification contains Sun proprietary and confidential
   information. It is being provided to you pursuant to the provisions of
   your agreement to purchase services from Sun, or, if you do not have
   such an agreement, the Sun.com Terms of Use. This Sun Alert
   notification may only be used for the purposes contemplated by these
   agreements.

   Copyright 2000-2004 Sun Microsystems, Inc., 4150 Network Circle, Santa
   Clara, CA 95054 U.S.A. All rights reserved.

References

   1. http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-57664-1#top
   2. http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0686
   3. http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-57664-1#top

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2.


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===========================================================================
            

               ESB-2004.0680 -- Sun Alert Notification 57658
        Security Vulnerabilities Involving the utempter(8) Utility
                              27 October 2004

===========================================================================

        

Product:                utempter
Publisher:              Sun Microsystems
Operating System:       Sun Java Desktop System
Impact:                 Overwrite Arbitrary Files
Access:                 Existing Account
CVE Names:              CAN-2004-0233

Ref:                    ESB-2004.0370

Original Bulletin URL:  
  http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-57658-1

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   Sun(sm) Alert Notification 
     * Sun Alert ID: 57658
     * Synopsis: Security Vulnerabilities Involving the utempter(8)
       Utility
     * Category: Security
     * Product: Sun Java Desktop System (JDS)
     * BugIDs: 6179483
     * Avoidance: Patch
     * State: Resolved
     * Date Released: 26-Oct-2004
     * Date Closed: 26-Oct-2004
     * Date Modified:

   1. Impact Unprivileged local users may be able to overwrite arbitrary
   files on a system due to a security vulnerability in the utempter(8)
   utility.

   Note: utempter(8) is a privileged helper program that writes utmp/wtmp
   entries for unprivileged programs.

   This issue is described in the following documents:

     * [2]http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0233
     * [3]http://xforce.iss.net/xforce/xfdb/15904
     * [4]http://www.ciac.org/ciac/bulletins/o-133.shtml

   2. Contributing Factors This issue can occur in the following
   releases:

   Linux

     * Sun Java Desktop System (JDS) 2003 without the updated RPMs
       (patch-8934)
     * Sun Java Desktop System (JDS) Release 2 without the updated RPMs
       (patch-8934)

   Note: JDS for Solaris is not impacted by this issue.

   This issue only occurs with utempter versions utempter-0.5.2-342 or
   earlier.

   To determine the release of JDS for Linux installed on a system, the
   following command can be run:

    % cat /etc/sun-release 
    Sun Java Desktop System, Release 2 -build 10b (GA)
    Assembled 30 March 2004

   To determine the version of utempter, the following command can be
   run:

    % rpm -qf /usr/sbin/utempter
    utempter-0.5.2-342

   3. Symptoms There are no predictable symptoms that would show the
   described issue has been exploited.

   Solution Summary [5]Top

   4. Relief/Workaround There is no workaround. Please see the
   "Resolution" section below.

   5. Resolution This issue is addressed in the following releases:

   Linux

     * Sun Java Desktop System (JDS) 2003 with the updated RPMs
       (patch-8934)
     * Sun Java Desktop System (JDS) Release 2 with the updated RPMs
       (patch-8934)

   To download and install the updated RPMs from the update servers
   select the following from the launch bar:

    Launch >> Applications >> System Tools >> Online Update



   For additional information on obtaining updates see:

     * [6]http://wwws.sun.com/software/javadesktopsystem/faq.html#5q5 
     * [7]http://wwws.sun.com/software/javadesktopsystem/faq.html#5q7

   This Sun Alert notification is being provided to you on an "AS IS"
   basis. This Sun Alert notification may contain information provided by
   third parties. The issues described in this Sun Alert notification may
   or may not impact your system(s). Sun makes no representations,
   warranties, or guarantees as to the information contained herein. ANY
   AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
   WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
   NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT
   YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT,
   INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE
   OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN.
   This Sun Alert notification contains Sun proprietary and confidential
   information. It is being provided to you pursuant to the provisions of
   your agreement to purchase services from Sun, or, if you do not have
   such an agreement, the Sun.com Terms of Use. This Sun Alert
   notification may only be used for the purposes contemplated by these
   agreements.

   Copyright 2000-2004 Sun Microsystems, Inc., 4150 Network Circle, Santa
   Clara, CA 95054 U.S.A. All rights reserved.

References

   1. http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-57658-1#top
   2. http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0233
   3. http://xforce.iss.net/xforce/xfdb/15904
   4. http://www.ciac.org/ciac/bulletins/o-133.shtml
   5. http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-57658-1#top
   6. http://wwws.sun.com/software/javadesktopsystem/faq.html#5q5
   7. http://wwws.sun.com/software/javadesktopsystem/faq.html#5q7

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UNIRAS wishes to acknowledge the contributions of Sun Microsystems for the information 
contained in this Briefing. 
- ----------------------------------------------------------------------------------
This Briefing contains the information released by the original author. Some 
of the information may have changed since it was released. If the vulnerability 
affects you, it may be prudent to retrieve the advisory from the canonical site 
to ensure that you receive the most current information concerning that problem.

Reference to any specific commercial product, process, or service by trade 
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Neither UNIRAS or NISCC shall also accept responsibility for any errors 
or omissions contained within this briefing notice. In particular, they shall 
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with the usage of information contained within this notice.

UNIRAS is a member of the Forum of Incident Response and Security Teams (FIRST) 
and has contacts with other international Incident Response Teams (IRTs) in 
order to foster cooperation and coordination in incident prevention, to prompt 
rapid reaction to incidents, and to promote information sharing amongst its 
members and the community at large. 
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<End of UNIRAS Briefing>

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